I worked with autistic kids for a few years and many of them are very ritualistic and superstitious (at least the higher functioning ones) and often the superstitions are their own invention ie,. only exit and enter a house through the same door (otherwise its bad luck) etc. And I think we all share the same ritualistic traits and find a certain security in a pattern and (find that we get thrown off a little when the pattern is broken) Eg. getting up in the morning and doing the same routine or driving to work the same way.